Finding the Fourth Proportional to 22,267.50, 30,731.31 and 12,331.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,267.50 : 30,731.31 = 12,331.50 : x
2. Step 2: Convert to fraction form
   22,267.50/30,731.31 = 12,331.50/x
3. Step 3: Cross multiply
   22,267.50x = 30,731.31 × 12,331.50
4. Step 4: Simplify right side
   22,267.50x = 378,963,149.27
5. Step 5: Solve for x
   x = 378,963,149.27/22,267.50
6. Step 6: Final answer
   x = 17,018.67